冻融法合成Sr高效吸附剂硅钛酸钠  

Synthesis of High Efficient Absorbent for Sr by Freezing and Thawing Method

作　　者：郑宇 李玉松 张振涛[1] 王雷[1] 华小辉[1] 游新锋[1] 郑文俊 杨林月 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2017年第6期454-458,共5页Journal of Nuclear and Radiochemistry

摘　　要："冻融法"合成了高效除Sr吸附剂。经扫描电镜(SEM)、差示扫描量热仪(DSC)和热重分析(TG)等分析方法对吸附剂进行了形貌及成分表征。考察了吸附剂硅钛酸钠对非放射性模拟废液中Sr的去除能力,验证了硅钛酸钠对放射性废液中90Sr的深度净化能力。实验结果显示,合成的硅钛酸钠对废液中Sr的吸附效果十分出色,在室温、pH=13的条件下,硅钛酸钠对非放模拟废液中Sr的吸附Kd值超过105 mL/g;同时所制备的吸附剂具有极强的耐盐性。"冻融法"制备吸附剂过程简单、产量大,适于工业化生产。In this paper,high efficient absorbent for Sr named crystalline silicontitanate was prepared through the"freezing and thawing"method.The morphology and composition of absorbent were characterized by SEM,DSC,TG and other analytical methods.The removal ability of Sr in non radioactive waste liquid was investigated,and the deep purification ability of 90 Sr in the high salt radioactive waste liquid was verified.When the pH of solution is 13,the crystalline silicontitanate has a very strong adsorption effect to Sr.The Kdvalue is larger than 105 mL/g.And it is indicated that the absorbent has strong salt resistance.The"freezing and thawing"method is simple and has large output.It is suitable for industrial production.

关 键 词：吸附 锶 冻融法 吸附剂 放射性废液 

分 类 号：TL941.1[核科学技术—辐射防护及环境保护]